Doncaster midfielder John Oster could be sidelined until the turn of the year after learning that he needs neck surgery.
Oster has been struggling with a neck problem in recent weeks and Rovers had hoped the 32-year-old was only suffering from a strain.
But the injury is more serious than first thought and Oster requires an operation to cure the problem.
He is set to go under the knife next week and is expected to be sidelined for up to two months.
Oster's absence is a blow for struggling Rovers, who are second from bottom in the Championship after losing their last three league games.
The Welshman has been an ever present in the Doncaster side and netted the winner in the recent victory over Crystal Palace.